diff --git a/config/config.yaml b/config/config.yaml
index dfcbeab25..87637f0b5 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -11,7 +11,7 @@ OPENAI_API_BASE: "https://api.openai.com/v1"
 OPENAI_API_MODEL: "gpt-4-1106-preview"
 MAX_TOKENS: 4096
 RPM: 10
-LLM_TYPE: OpenAI
+#LLM_TYPE: OpenAI  # Except for these three major models – OpenAI, MetaGPT LLM, and Azure – other large models can be distinguished based on the validity of the key.
 
 #### if Spark
 #SPARK_APPID : "YOUR_APPID"
diff --git a/metagpt/llm.py b/metagpt/llm.py
index e4ae81735..ad4bf6cb2 100644
--- a/metagpt/llm.py
+++ b/metagpt/llm.py
@@ -44,7 +44,7 @@ class LLMFactory:
         if constructor:
             return constructor()
 
-        raise ValueError(f"Unsupported LLM TYPE: {CONFIG.LLM_TYPE}")
+        raise RuntimeError("You should config a LLM configuration first")
 
 
 # Used in metagpt